Photovoltaic industry counterattack: micro-inverter

State Grid Corporation of China officially issued the "Opinions on the Implementation of Distributed Photovoltaic Power Grid-connected Services" on the 26th, and the provinces covered by the State Grid have also introduced detailed specifications for the grid connection. Micro-inverters are favored by PV module manufacturers and EPC manufacturers due to their advantages such as multiple power generation, long design life, and easy installation and maintenance.

The micro-inverter's DC power conversion is from a single solar module AC, each solar cell module is equipped with inverter and converter functions, each component can carry out current conversion independently, so this is called "micro-inverter The “microinverter” enables maximum power point tracking (MPPT) at the panel level and has advantages over central inverters. In this way, the output power of each module can be optimized to maximize the overall output power.

In the past, inverter purchasers had spent a long time explaining the advantages of micro-reversals. They also recognized many benefits of micro-reversals, but in the end the customers were repulsed because of policies and other factors. With the continuous introduction of national policies, the market outlook for micro-inverters is gradually improving.

Due to the release of the latest distributed power generation policy, Shanghai Power has begun to accept distributed photovoltaic power generation on-grid. At present, ordinary users with advanced awareness are already preparing to install a 1 KW system on their home roofs. The relevant person pointed out that: According to the calculation of 1 kWh of electricity, the system is conservatively estimated to send 21900 kWh of electricity within 20 years of its service life. At present, under the relevant national policies, unified purchase and sales are implemented, and the electric power company purchases at 1 yuan/kWh, for a total of 21,900 yuan, while the one-time input cost when setting up the 1.5kW system is 9,000 yuan. Ordinary users can expect to earn $12,900. With regard to the recent market conditions, recently some real estate developers have also begun to set foot in the micro-reversal market, and usually the demand is relatively large, which further promotes the development of the micro-inverter market. The era of micro-reverse in the country is really about to start large-scale use.

Referring to centralized inverters, many domestic customers have already realized that “centralized inverters have no advantage in distributed generation and grid connection projects, and they have disadvantages such as low power generation, short life, and inconvenient maintenance. Seriously affect the stability of the system, causing the loss of the investor's profits."

A market analyst of an industry media mentioned that “EPCs in Jiangsu Province had previously used centralized inverters. Recently, some investors have used centralized inverters to build systems before using micro-retrofitting.”

In the difficult years of the PV industry, component factories and EPC companies will be like Phoenix Nirvana. Perhaps micro-inverters will give the industry a chance to regenerate. The era of ignoring the generation of electricity, the life of the power plant, and the low price of hostile competition may be gone forever. This is a great fortune for the photovoltaic industry.